Improved dental handpiece



FIG. 1 is a perspective view of an improved dental handpiece showing my design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevation view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front elevation view thereof; and,

FIG. 6 is a rear elevation view thereof.

The broken lines are shown for illustrative purposes only. 

The ornamental design for an improved dental handpiece, as shown and described. 